phorphiex | 953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6d

Windows Service

Disable or Modify System Firewall

T1562.004

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0"	sysyhlrsv.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0"	sysyhlrsv.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1"	sysyhlrsv.exe

Modifies security service 2 TTPs 1 IoCs

evasion

Modify Registry

Windows Service

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wuauserv\Start = "4"	sysyhlrsv.exe

Phorphiex family
phorphiex

Phorphiex payload 5 IoCs

resource	yara_rule
behavioral1/memory/1688-0-0x0000000000400000-0x000000000042E000-memory.dmp	family_phorphiex
behavioral1/files/0x0017000000016c92-40.dat	family_phorphiex
behavioral1/memory/2816-43-0x0000000000400000-0x000000000042E000-memory.dmp	family_phorphiex
behavioral1/memory/1688-58-0x0000000000400000-0x000000000042E000-memory.dmp	family_phorphiex
behavioral1/memory/2816-226-0x0000000000400000-0x000000000042E000-memory.dmp	family_phorphiex

Phorphiex, Phorpiex
Phorphiex or Phorpiex Malware family which infects systems to distribute other malicious payloads such as ransomware, stealers and cryptominers.
worm trojan loader phorphiex
Sality
Sality is backdoor written in C++, first discovered in 2003.
backdoor sality
Sality family
sality

UAC bypass 3 TTPs 2 IoCs

Bypass User Account Control

T1548.002

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	sysyhlrsv.exe

Windows security bypass 2 TTPs 13 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1"	sysyhlrsv.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	sysyhlrsv.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	sysyhlrsv.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1"	sysyhlrsv.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	sysyhlrsv.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesOverride = "1"	sysyhlrsv.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	sysyhlrsv.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2540	powershell.exe

Stops running service(s) 4 TTPs
evasion execution

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Service Execution
T1569.002

Executes dropped EXE 1 IoCs

pid	Process
2816	sysyhlrsv.exe

Windows security modification 2 TTPs 16 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\Svc	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1"	sysyhlrsv.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	sysyhlrsv.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	sysyhlrsv.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	sysyhlrsv.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiSpywareOverride = "1"	sysyhlrsv.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	sysyhlrsv.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\Svc	sysyhlrsv.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesOverride = "1"	sysyhlrsv.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1"	sysyhlrsv.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Settings = "C:\\Windows\\sysyhlrsv.exe"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	sysyhlrsv.exe

Enumerates connected drives 3 TTPs 3 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\E:	sysyhlrsv.exe
File opened (read-only)	\??\G:	sysyhlrsv.exe
File opened (read-only)	\??\H:	sysyhlrsv.exe

UPX packed file 20 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/1688-1-0x0000000001E30000-0x0000000002EEA000-memory.dmp	upx
behavioral1/memory/1688-6-0x0000000001E30000-0x0000000002EEA000-memory.dmp	upx
behavioral1/memory/1688-8-0x0000000001E30000-0x0000000002EEA000-memory.dmp	upx
behavioral1/memory/1688-3-0x0000000001E30000-0x0000000002EEA000-memory.dmp	upx
behavioral1/memory/1688-5-0x0000000001E30000-0x0000000002EEA000-memory.dmp	upx
behavioral1/memory/1688-4-0x0000000001E30000-0x0000000002EEA000-memory.dmp	upx
behavioral1/memory/1688-11-0x0000000001E30000-0x0000000002EEA000-memory.dmp	upx
behavioral1/memory/1688-10-0x0000000001E30000-0x0000000002EEA000-memory.dmp	upx
behavioral1/memory/1688-9-0x0000000001E30000-0x0000000002EEA000-memory.dmp	upx
behavioral1/memory/1688-7-0x0000000001E30000-0x0000000002EEA000-memory.dmp	upx
behavioral1/memory/1688-36-0x0000000001E30000-0x0000000002EEA000-memory.dmp	upx
behavioral1/memory/1688-35-0x0000000001E30000-0x0000000002EEA000-memory.dmp	upx
behavioral1/memory/1688-59-0x0000000001E30000-0x0000000002EEA000-memory.dmp	upx
behavioral1/memory/2816-69-0x0000000003590000-0x000000000464A000-memory.dmp	upx
behavioral1/memory/2816-73-0x0000000003590000-0x000000000464A000-memory.dmp	upx
behavioral1/memory/2816-72-0x0000000003590000-0x000000000464A000-memory.dmp	upx
behavioral1/memory/2816-98-0x0000000003590000-0x000000000464A000-memory.dmp	upx
behavioral1/memory/2816-71-0x0000000003590000-0x000000000464A000-memory.dmp	upx
behavioral1/memory/2816-100-0x0000000003590000-0x000000000464A000-memory.dmp	upx
behavioral1/memory/2816-96-0x0000000003590000-0x000000000464A000-memory.dmp	upx

Drops file in Windows directory 5 IoCs

description	ioc	Process
File created	C:\Windows\sysyhlrsv.exe	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
File opened for modification	C:\Windows\sysyhlrsv.exe	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
File created	C:\Windows\f77d46f	sysyhlrsv.exe
File created	C:\Windows\f779897	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
File opened for modification	C:\Windows\SYSTEM.INI	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe

Launches sc.exe 5 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
2548	sc.exe
2788	sc.exe
3004	sc.exe
984	sc.exe
1084	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 10 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sysyhlrsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
2540	powershell.exe
2816	sysyhlrsv.exe

Suspicious use of AdjustPrivilegeToken 45 IoCs

description	pid	Process
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Token: SeDebugPrivilege	2540	powershell.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe
Token: SeDebugPrivilege	2816	sysyhlrsv.exe

Suspicious use of WriteProcessMemory 45 IoCs

description	pid	Process	procid_target
PID 1688 wrote to memory of 1112	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe	19
PID 1688 wrote to memory of 1176	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe	20
PID 1688 wrote to memory of 1212	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe	21
PID 1688 wrote to memory of 1576	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe	23
PID 1688 wrote to memory of 2816	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe	30
PID 1688 wrote to memory of 2816	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe	30
PID 1688 wrote to memory of 2816	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe	30
PID 1688 wrote to memory of 2816	1688	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe	30
PID 2816 wrote to memory of 2884	2816	sysyhlrsv.exe	31
PID 2816 wrote to memory of 2884	2816	sysyhlrsv.exe	31
PID 2816 wrote to memory of 2884	2816	sysyhlrsv.exe	31
PID 2816 wrote to memory of 2884	2816	sysyhlrsv.exe	31
PID 2816 wrote to memory of 2524	2816	sysyhlrsv.exe	33
PID 2816 wrote to memory of 2524	2816	sysyhlrsv.exe	33
PID 2816 wrote to memory of 2524	2816	sysyhlrsv.exe	33
PID 2816 wrote to memory of 2524	2816	sysyhlrsv.exe	33
PID 2884 wrote to memory of 2540	2884	cmd.exe	35
PID 2884 wrote to memory of 2540	2884	cmd.exe	35
PID 2884 wrote to memory of 2540	2884	cmd.exe	35
PID 2884 wrote to memory of 2540	2884	cmd.exe	35
PID 2524 wrote to memory of 2548	2524	cmd.exe	36
PID 2524 wrote to memory of 2548	2524	cmd.exe	36
PID 2524 wrote to memory of 2548	2524	cmd.exe	36
PID 2524 wrote to memory of 2548	2524	cmd.exe	36
PID 2524 wrote to memory of 2788	2524	cmd.exe	37
PID 2524 wrote to memory of 2788	2524	cmd.exe	37
PID 2524 wrote to memory of 2788	2524	cmd.exe	37
PID 2524 wrote to memory of 2788	2524	cmd.exe	37
PID 2524 wrote to memory of 3004	2524	cmd.exe	38
PID 2524 wrote to memory of 3004	2524	cmd.exe	38
PID 2524 wrote to memory of 3004	2524	cmd.exe	38
PID 2524 wrote to memory of 3004	2524	cmd.exe	38
PID 2524 wrote to memory of 984	2524	cmd.exe	39
PID 2524 wrote to memory of 984	2524	cmd.exe	39
PID 2524 wrote to memory of 984	2524	cmd.exe	39
PID 2524 wrote to memory of 984	2524	cmd.exe	39
PID 2524 wrote to memory of 1084	2524	cmd.exe	40
PID 2524 wrote to memory of 1084	2524	cmd.exe	40
PID 2524 wrote to memory of 1084	2524	cmd.exe	40
PID 2524 wrote to memory of 1084	2524	cmd.exe	40
PID 2816 wrote to memory of 1112	2816	sysyhlrsv.exe	19
PID 2816 wrote to memory of 1176	2816	sysyhlrsv.exe	20
PID 2816 wrote to memory of 1212	2816	sysyhlrsv.exe	21
PID 2816 wrote to memory of 1576	2816	sysyhlrsv.exe	23
PID 2816 wrote to memory of 2740	2816	sysyhlrsv.exe	41

System policy modification 1 TTPs 2 IoCs

evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	sysyhlrsv.exe

C:\Windows\system32\taskhost.exe
"taskhost.exe"
1⤵
PID:1112

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1176

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1212
- C:\Users\Admin\AppData\Local\Temp\953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe
  "C:\Users\Admin\AppData\Local\Temp\953425bbd6408fb6ee0b3c9f33d4b1928e1059f0f23eebf7ad57444114816a6dN.exe"
  2⤵
  - Modifies firewall policy service
  - UAC bypass
  - Windows security bypass
  - Windows security modification
  - Adds Run key to start application
  - Checks whether UAC is enabled
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  - System policy modification
  PID:1688
- - C:\Windows\sysyhlrsv.exe
    C:\Windows\sysyhlrsv.exe
    3⤵
    - Modifies firewall policy service
    - Modifies security service
    - UAC bypass
    - Windows security bypass
    - Executes dropped EXE
    - Windows security modification
    - Checks whether UAC is enabled
    - Enumerates connected drives
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    - System policy modification
    PID:2816
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c powershell -Command "Add-MpPreference -ExclusionPath $env:windir; Add-MpPreference -ExclusionPath $env:TEMP; Add-MpPreference -ExclusionPath $env:USERPROFILE"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2884
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        powershell -Command "Add-MpPreference -ExclusionPath $env:windir; Add-MpPreference -ExclusionPath $env:TEMP; Add-MpPreference -ExclusionPath $env:USERPROFILE"
        5⤵
        Command and Scripting Interpreter: PowerShell
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2540
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c sc stop UsoSvc & sc stop WaaSMedicSvc & sc stop wuauserv & sc stop DoSvc & sc stop BITS
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2524
    - - C:\Windows\SysWOW64\sc.exe
        
        sc stop UsoSvc
        5⤵
        Launches sc.exe
        System Location Discovery: System Language Discovery
        
        PID:2548
    - - C:\Windows\SysWOW64\sc.exe
        
        sc stop WaaSMedicSvc
        5⤵
        Launches sc.exe
        System Location Discovery: System Language Discovery
        
        PID:2788
    - - C:\Windows\SysWOW64\sc.exe
        
        sc stop wuauserv
        5⤵
        Launches sc.exe
        System Location Discovery: System Language Discovery
        
        PID:3004
    - - C:\Windows\SysWOW64\sc.exe
        
        sc stop DoSvc
        5⤵
        Launches sc.exe
        System Location Discovery: System Language Discovery
        
        PID:984
    - - C:\Windows\SysWOW64\sc.exe
        
        sc stop BITS
        5⤵
        Launches sc.exe
        System Location Discovery: System Language Discovery
        
        PID:1084
  - - C:\Users\Admin\AppData\Local\Temp\85933496.exe
      C:\Users\Admin\AppData\Local\Temp\85933496.exe
      4⤵
      PID:3012
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c reg delete "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "Windows Upgrade Manager" /f
        5⤵
        
        PID:2124
      - C:\Windows\system32\reg.exe
        
        reg delete "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "Windows Upgrade Manager" /f
        6⤵
        
        PID:1716
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c schtasks /delete /f /tn "Windows Upgrade Manager"
        5⤵
        
        PID:2240
      - C:\Windows\system32\schtasks.exe
        
        schtasks /delete /f /tn "Windows Upgrade Manager"
        6⤵
        
        PID:1992

C:\Windows\system32\DllHost.exe
C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
1⤵
PID:1576

C:\Windows\system32\DllHost.exe
C:\Windows\system32\DllHost.exe /Processid:{F9717507-6651-4EDB-BFF7-AE615179BCCF}
1⤵
PID:2740

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

Modify Registry